package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceimpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;


    @Override
    public void submit(Orders orders) {
        /**
         * A. 获得当前用户id, 查询当前用户的购物车数据
         *
         * B. 根据当前登录用户id, 查询用户数据
         *
         * C. 根据地址ID, 查询地址数据
         *
         * D. 组装订单明细数据, 批量保存订单明细
         *
         * E. 组装订单数据, 批量保存订单数据
         *
         * F. 删除当前用户的购物车列表数据
         */

        Long userid = BaseContext.get();
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, userid);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list();
        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new CustomException("购物车为空,不能下单");
        }
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook=addressBookService.getById(addressBookId);
        User user = userService.getById(userid);
        if (addressBook==null){
            throw new CustomException("地址信息有误,无法下单");
        }
        long orderId = IdWorker.getId();
        AtomicInteger amount=new AtomicInteger(0);

        List<OrderDetail> orderDetails=shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail=new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userid);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        this.save(orders);

        orderDetailService.saveBatch(orderDetails);

        shoppingCartService.remove(queryWrapper);


    }
}
